Worcester Bosch Rubber Seal 87102030400

This is a rubber seal supplied by Worcester Bosch under part number 87102030400. It is a sealing component used within the Greenstar range of domestic gas boilers, where it sits between mating surfaces to prevent water or flue gas escape at the joint. Seals of this type are consumable items: they harden, flatten and lose their elasticity over years of heat cycling, so they are normally replaced whenever the joint is disturbed during a repair or service.

• Visible water weeping or damp staining around the joint the seal sits in
• A seal that has gone hard, brittle or flattened and no longer springs back when squeezed
• Traces of corrosion or scale on the mating faces where a perished seal has allowed moisture through
• A joint that continues to seep after being tightened, indicating the seal has taken a permanent set
• A seal that crumbles or tears when the joint is opened for routine maintenance

• Check the GC number and model on the appliance data badge against the compatibility list before ordering, as the same part number can be listed against several variants.
• Confirm the part number 87102030400 or the alternative number 1012347 matches the item you are replacing.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.